Ah, a non-believer
I'm too much of a perfectionist to ever settle for a bad job and would get it as close as most shops would(not completely inexperienced), but I fully understand your points. I had plans to remove the cover and construct a small clean room for the job, but if I could find someone to do it for $300-400, I would probably do that.
My estimates have ranged between $800-1200
